How to Compress Images for the Web Without Losing Quality
Large, unoptimized images increase page weight, delay rendering and make mobile visitors wait. A good web workflow reduces dimensions and file size while keeping the image clear at the size where it will actually appear.
· 5 min read
Choose the right image format
Use JPEG for photographs and complex gradients, PNG for graphics that require transparency or lossless detail, and WebP when you want a modern format that usually delivers smaller files. Keep an original master copy before converting so future edits do not compound compression loss.
Resize before you compress
Do not publish a 4000-pixel photo in a 900-pixel content column. Resize close to the largest rendered size, while allowing enough resolution for high-density screens. Correct dimensions often save more bytes than aggressive quality reduction.
Find a practical quality setting
Start around 80% quality for photographs, inspect fine textures and text, then reduce gradually. There is no universal setting: screenshots, product photos and illustrations react differently. Compare the preview instead of targeting the smallest number at any cost.
Compress locally without uploading
BrowserCompress processes the image in browser memory. Select the file, choose quality and output format, review the before-and-after sizes, then download the optimized result. The image content and filename are not uploaded to our server.
Verify the result on your website
Test important pages on both desktop and mobile. Check that text inside images remains legible, transparency is preserved and the chosen format is supported by your delivery setup. Use responsive images and lazy loading where appropriate, then measure Core Web Vitals again.